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Top
of
country
house
that’s
horrible
for
bird
(6)
Top of country house that’s horrible for bird (6)
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The definition is at the end of the clue.
How the clue works
The definition here is bird, pointing to a chough, which is a type of crow. You get there by taking C as the "top of" Country, then HO for "house", and UGH as an exclamation meaning "that's horrible" — put them all together and you've got your answer.